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Table 10 Evaluation of dispersions for different polymers

From: Long permanence high altitude airships: the opportunity of hydrogen

Loses for a 20 μm membrane Ground 16 km
  V(H2) V(He) V(02) V(H2) V(He) V(02)
  [m3gas/m2 h] [m3gas/m2 h] [m3gas/m2 h] [m3gas/m2 h] [m3gas/m2 h] [m3gas/m2 h]
Poly(ethylene) density 0.914 g/cm^-3 7.13E-05 3.56E-05 2.12E-05 1.07E-05 5.34E-06 3.18E-06
Polyvinilecloride plasticized 10 % 1.25E-05   3.69E-08 1.88E-06   5.53E-09
Polyvinilacetate 4.77E-05 2.88E-05 1.31E-06 7.15E-06 4.32E-06 1.96E-07
Poly(trifluorochloroethylene) film 30 % cristallinity 6.79E-06 4.91E-05 2.89E-07 1.02E-06 7.37E-06 4.33E-08
Mylar A 4.7E-06 2.35E-06 2.89E-07 7.05E-07 3.52E-07 4.33E-08
Nylon 6      5.75E-07 4.12E-08
Nylon 11 1.29E-05 1.41E-05   1.94E-06 2.11E-06  
Cellophane (relative humidity 43 %) 1.16E-07   5.16E-08 1.73E-08   7.74E-09